Fig. 6

Enhanced secretion of growth factors in green OLED-treated hADSCs and proliferative effects of harvested CM. a Gene expression levels of VEGF and HGF in hADSCs at 0, 24, and 48 h after green OLED irradiation for 24 h as evaluated by qRT-PCR (n = 5). b VEGF and HGF proteins secreted from hADSCs at 0, 24, and 48 h after green OLED irradiation for 24 h as evaluated by ELISA (n = 5). Gene expression levels of KI67, PCNA, and C-MYC in hDFs and NHEKs cultured in 25% (c) and 50% (d) conditioned media as evaluated by qRT-PCR (n = 5). *p < 0.05; **p < 0.001 compared to no treatment group with unpaired t test